Apparatus for molding articles from cementitious material.



PATENTED MAY 12, 1908.

A. ZUBERBUHLER.

APPARATUS FOR MOLDING ARTIGLES PROM CEMENTITIOUS MATERIAL.

APPLICATION FILED NOV. 24, 1906.

4 SHEETS-SHEET 1.

zJIIIIIIIII I I WITNESSES v- No. 887,565. PATENTED MAY 12, 1908. A. ZUBERBUHLER. APPARATUS FOR MOLDING ARTICLES FROM GEMENTITIOUS MATERIAL.

APPLICATION FILED NOV. 24, 1906.

4 SHEETS-SHEET 2.

WITNESSES INVENTOR.

A/aMydmmaf/c/ v) BY r No. 887,565. PATENTED MAY 12, 1908. A. ZUBBRBUHLBR.

APPARATUS FOR MOLDING ARTICLES FROM GEMENTITIOUS MATERIAL.

APPLICATION FILED NOV. 24, 1906.

4 SHEETS-SHEET 3.

WITNESSES: I INVEAVTOR.

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I W A TTO 5nd PATENTED MAY 12, 1908.

, A. ZUBERBUHLER. APPARATUS FOR MOLDING ARTICLES FROM GEMBNTITIOUS MATERIAL.

APPLIOATION FILED NOV. 24, 1906.

4 SHEETS-SHEET 4.

INVENTOR.

A TT0 15),

WITNESSES.-

UNITED STATES PATENT OFFICE.

', ALEXANDER ZUBERBUHLER, OF TORONTO, oN'TARIo, CANADA.

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Specification of Letters, Patent.

Patontgd Kay '12, 1908.

Application filed November 24, 1906. Serial No. 844,852;

' paratus for Molding Articles from Cementitious Material, of which the following is a specification.

My object is to devise simple, efiective and expeditious means for molding various articles from cementitious materials, and particularly from concrete. i

It is well known that concrete when filled into a mold has a tendency to form arches in the material, particularly in narrow and deep molds, which prevents t e proper solidifying and compactin of the material. I over come the difiicu ty by closing the mold after it has been filled, and by causing the bottom to approach the. top of the mold, thus compractlng and solidifying the mass by pressure cm below which tends to break up the arches as these have no strength to resist such u ward pressure. The ap aratus by which" accom lish this result is hereinafter more s cifica y described, and then definitely c aimed.

Figure 1 is a side elevation, partly in section, of my improved apparatus. ig. 2 is a front elevation, artl in section, with the mold cover closed ig. 3 is a lan view of the a paratus with the filler sli back showin t e mold with its cover open. Fi 4 is a lront elevation of the a paratus wit the mold lowered to free it irom the molded article. Fig. 5 is a plan view of the mold with the cover closed. Fig. 6 is an end elevation, partly in section, showin the locking means for the mold cover. ig. 7 is a diagrammatical view of a mold before compression of a block. Fig. 8 is a similar view after compression. Fig. 9 is a diagrammatical view illustrating the formation of an arch and how it may be broken up by pressure from below.

In the drawings like letters of reference indicate corresponding parts in the difierent figures.

A is a stand suitably shaped to support a plurality of vertical guide rods B.

C is a frame adapted to slide on theseguides b means of t e lugs athrough which the i e rods pass. To the ufpper end of this ame is secured a mold D, 0 any desired shape and size, preferably formed of metal,

or wood lined with metal.

E is a loose mold bottom, either'of wood or metal or wood and metal combined, which rests upon the upper ends of the guide rods B. A pallet R separate from the bottom ma also be employed.

f cores F are to be used in molding. the article for the urpose of producing hollow spaces therein t ese will be supported on the frame 0, as shown, and secured thereto in any suitable manner. When cores are-employed it' is of course necessary to provide apertures in the bottom E through which the cores may project into the interior of the mold. a

The mold is provided with a cover G hinged at b at one side of'the mold. 'At the other end of the cover is fulcrumed aT-lever H, provided with a suitable handle a. Bolts I are longitudinally slidable in lugs d formed on the cover, and are provided with slotted arms e extending in opposite directions, as

provided in a suitable part of the end of the mold into which the bolts I maybe shot by rocking the T-lever.

In Fig. 6 I show the parts in full lines with the bolts shot home to lock the cover.

ear when the olts are withdrawn to reease the cover.

The frame 0 is vertically movable on the guide rods B by means of a bent 'lever J fulcrumed at h on the stand A. The end of this lever is provided with a projection 41, preferably formed as a small roller which enters a substantially horizontal slot 7' in the frame.

By 0 crating this lever the mold may be 95 raise and held in the position shown in Fig. i or allowed to drop to'the position shown in ith the mold is associated a filler. This is formed of a bottomless box K, which is provided with rearwardly extendin arms L, rovided with lugs adapted to sli e on the orizontal guiderods k secured to a table M su ported by suitable frame work N. If the or is to be used with a mold rovided with cores a guide or deflector, O. l he provided over each core connected by means of suitable arms 1 to the sides of the box. These In dotted lines the arts are shown as they apof the filler, when the latter is in position over the mold,is" the lower endof a chute or hopper P, by means of which cementitious material ma be fed into the filler. The filler is operated y means of a bent lever Q fulcrumed on the table M at m, and provided with a rojection preferably formed as a small to er, which enters a substantially vertical slot it formed in one of the earwardly extending arms L of the filler. By operating this lever Qthe filler may be moved to the position shown in Fig. 1, or else withdrawn over the table, as shown in Fi 3.

The operation of the device is su stantially as follows;The concrete falls from the chute or hop er P through the bottomless box K into t e mold D and fills the latter. The lever Q is then operated to withdraw the bottomless box'into the position shown in Fig. 3. By this movement all superfluous material is scra ed from the top of the mold and carried bacfi onto the table M. The cover G of the mold is then closed and locked in the manner already described. The operator then be s to move the lever J from the position s own in Fi 2. The support is then withdrawn from t e mold D since it is dependent on the support of the projection '41 of the said lever to hold it in place. The weight of the mold now causes it to move downward until the material is thorou hly solidified. It be seen that although it is the mold which moves whilethe mold bottom is held stationary the effect is the same as if the reverse were the case, as the cementitious material or concrete is pushed up from below by the upward movement of the bottom,

relative to the sides and cover of the mold.

This effectually breaks up any arches which 1 may have formed in the material and causes downward movement liberates the finished article, which is shown as a block of buildin material. The block may now be carrie away on the bottom E and a new bottom placed in osition ready for the molding of the next b ock. The parts may now be returned to their normal position by reversing the movements already described.

It is understood, of course, that during the operation of molding any suitable reinforcement for the block may be placed in the molds without interfering in any way with the operations already described. The downward sliding of the mold when liberating the block smoothes the sides of the same and gives them a finished and handsome appearance. By the use ofmy .ap aratus a complete block, or other article; t oroughl compact throughout, and of finished appearance, is turnedout with a minimum of labor.

While I have described what I deem the best construction for my pu ose, it is evident that many changes can e made in the details of construction 'Without departing from the spirit of my invention.

What I claim as my invention is:

1. In apparatus for molding articles from cementitious material, the combination of a vertically movable mold; a stationary bot:

tom; a removable cover for the mold; means for locking the cover on the mold; and means for holding the mold in its normal position and for permitting it to drop down therefrom,

substantially as described.

2. In apparatus for molding articles from cementitious material, the combination of a mold; a removable cover hinged thereon a mold bottom; means for locking the cover on the mold; means foreffectin an'upward movement of the bottom re ative to the cover to compress the molded article from below; and means for imparting a vertical movement to the mold to free it from a molded article, substantially as described.

3. In apparatus for molding articles from cementitious material, the combination of stationary vertical guide rods; a frame movable on the guide rods; a mold carried by said frame; and a removable mold bottom supported on the upper ends of .the guide.

rods, substantially as described.

4. In apparatus for molding articles from cementitious material, the combination of stationary vertical guide rods; a frame movable on the guide rods; a mold carried by said frame; a removable mold bottom supported on the upper ends of the guide rods; a removable cover for the mold; and means for looking it in place on the mold, substantially as described.

5. In apparatus for molding articles from cementitious material, the combination of stationary vertical guide rods; a frame movable on the guide rods; a mold carried by said frame; a removable mold bottom supported on the upper ends of the guide rods; a bent lever fulcrumed on a stationary part; and a cementitious material, the combination of between the lever and theframe, substanvertical guide rods; a frame movable on the tially as described. guide regs; a mohli1 cali' ried by saig frlamlf1 a Toronto, Ont., 20th November, 1906. remova e cover t ere or; means or 00 'n 5 the cover on the mold; a removable mol ALEXANDER ZUBERBUHLER' bottom supported on the upper ends of the Signed in the presence ofguide rods; a bent lever fulcrumed on a sta- J. EDW. MAYBEE, tionary part; and a pin and slot connection JOHN G. RIDOUT. 

